INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Transformación de fases durante la desactivación de un catalizador de síntesis de metanol y propuesta de método de reciclado de metales
Autor/es:
C. GUIBALDO; G. DE MICCO; J.M. GRAU; A. BOHE
Lugar:
Santa Fe
Reunión:
Congreso; XXI Congreso Argentino de Catálisis - X Congreso de Catálisis del Mercosur; 2019
Institución organizadora:
Sociedad Argentina de Catálisis
Resumen:
CuO-ZnO-Al2O3 catalysts are used in methanol production process from syngas at low-temperature. This paper shows that catalysts deactivation may be related to coke accumulation and generation of spinel structures, arising from the reaction between metallic oxides and alumina and carbonate phases disappearance. In addition, pyromellurgical processes were studied in order to recover metals from the spent catalysts. Dry chlorination at 650 ºC allows extraction of Cu and Zn as volatile chlorides while spinel phases remain in the solid phase. Separation of metals from the chloride mixture is possible by thermal treatment under reducing atmosphere (H2 5 %) at 300 ºC. Metallic Cu is the condensed product of CuCl2 reduction and volatile ZnCl2 is separated from the solid. Finally, Zn can be recovered from ZnCl2 chloride by water dissolution and electrochemical reduction.